package com.sheep.classroompie.util;

import java.security.MessageDigest;

public class MD5Util {
    /**
     *MD5加码生成32位md5码
     */
    public static String string2MD5(String inStr){
        MessageDigest md5 = null;
        try{
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {
            System.out.println(e.toString());
            e.printStackTrace();
            return "";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];
        for(int i=0;i<charArray.length;i++)
            byteArray[i] = (byte) charArray[i];
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for(int i=0;i<md5Bytes.length;i++){
            int val = ((int)md5Bytes[i])&0xff;
            if(val<16)
                hexValue.append("0");
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();
    }
    /*
    自定义加密规则
    @param inStr
    @return
     */
    public static String MD5(String inStr){
        String xy = "abc";
        String finalStr="";
        if(inStr!=null){
            String fStr = inStr.substring(0, 1);
            String lStr = inStr.substring(1, inStr.length());
            finalStr = string2MD5(fStr+xy+lStr);
        }else{
            finalStr = string2MD5(xy);
        }
        return finalStr;
    }
}
